Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR RECOVERING RARE METAL SALT
Document Type and Number:
WIPO Patent Application WO/2021/215484
Kind Code:
A1
Abstract:
The present invention pertains to a method for recovering a rare metal salt, the method comprising: an acid treatment step for obtaining a rare metal-containing acidic aqueous solution by putting a material containing monovalent and polyvalent rare metals in contact with an acid aqueous solution; a separation step for obtaining permeated water containing the monovalent rare metal and non-permeated water containing the polyvalent rare metal from the rare metal-containing acidic aqueous solution by using a nanofiltration membrane satisfying a specific condition (1); and a concentration step for obtaining non-permeated water having a higher concentration of the monovalent rare metal and permeated water having a lower concentration than the permeated water in the separation step, by using a reverse osmosis membrane.

More Like This:
WO/2012/077610ALKALI METAL SEPARATION AND RECOVERY METHOD AND ALKALI METAL SEPARATION AND RECOVERY APPARATUS
WO/2014/098357METHOD FOR EXTRACTING LITHIUM FROM SOLUTION CONTAINING LITHIUM
WO/2020/116795METHOD FOR PRODUCING LITHIUM HYDROXIDE FROM LITHIUM CONCENTRATE BY MIXING AND ROASTING LITHIUM CONCENTRATE WITH SODIUM SULFATE
Inventors:
YOSHIZAKI TOMOYA (JP)
SOYA TAKANORI (JP)
KOIWA MASAKAZU (JP)
HANADA SHIGEHISA (JP)
Application Number:
PCT/JP2021/016220
Publication Date:
October 28, 2021
Filing Date:
April 21, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C22B26/12; B01D61/02; B01D61/58; B01D69/02; B01D69/10; B01D69/12; B01D71/56; C22B3/06; C22B3/22; C22B7/00; C22B7/04; C22B23/00; C22B47/00; H01M10/54
Domestic Patent References:
WO2013005694A12013-01-10
WO2012077610A12012-06-14
WO2019018333A12019-01-24
Foreign References:
US20190024212A12019-01-24
JP2001508925A2001-07-03
JPS4414216B1
JPH0411928B21992-03-03
JPH11226366A1999-08-24
JPS62201606A1987-09-05
JP2020075283A2020-05-21
JP2020075284A2020-05-21
JP2020094341A2020-06-18
JP2021506860A2021-02-22
JP2021056865A2021-04-08
Other References:
"Environment and Energy Business Headquarters", March 2018, MITSUBISHI RESEARCH INSTITUTE, INC., article "Report of exploration project for promotion of mineral resource development in 2017, research project of mineral resource industrial infrastructure (basic survey on mineral resource securing strategy development"
See also references of EP 4141135A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: VIDEO PROCESSING SYSTEM USING UNMANNED MOVING BODY, VIDEO PROCESSING METHOD, AND VIDEO PROCESSING DE...

Next Patent: METHOD FOR PRODUCING SOY SAUCE-LIKE SEASONING